732 TRAFFIC SIGNAL MATERIAL
732.01 Vehicular Signal Heads, Conventional. Ensure that
vehicular traffic signal heads conform to the ITE “Vehicle Traffic
Control Signal Heads” standard. In conformance with the above
standard, provide signal heads that are of cast nonferrous corrosion
resistant metal, with plastic or glass lenses, and reflectors of either highly
specular finished aluminum or silvered glass. When provided, plastic
lenses are ultraviolet stabilized, weather and impact resistant, and heat
resistant so that operation does not cause crazing, cracking, deformation,
color change, or other changes in physical properties.
Traffic signals consist of specified assemblies of optical sections
containing 8 or 12-inch (200 or 300 mm) diameter colored lenses, a
housing, a door frame with stainless steel hinge pins and latching device,
gasketing, visor, wiring, and includes LED lamp in accordance with
732.04. Twelve-inch (300 mm) lenses are the standard wide angle type.
All hardware used to join optical sections together shall be stainless steel.
Fit each optical section with a cutaway type visor unless other type
visors or louvering is specified. Ensure that the visors for 8-inch (200
mm) lenses are at least 7 inches (175 mm) long and those for 12-inch
(300 mm) lenses are at least 9 1/2 inches (240 mm) long.
Ensure that optical sections are designed for assembly with all 8-inch
(200 mm), all 12-inch (300 mm), or intermixed arrangements. Assemble
using suitable hardware that forms weatherproof joints with no light
leakage from one section to another. Ensure that the assembly
arrangements contain the specified number of optical sections, lens size,
lens color, and circular or arrow configuration. Assemble from one to a
maximum of five sections as specified to form a signal face.
Furnish multi-way heads with appropriate top and bottom brackets
with an opening in the center of the top bracket provided for mounting
purposes. Correct signal face height inequalities for multi-way heads for
proper accommodation between top and bottom brackets by the use of
pipe spacers.
Furnish signal heads with required mounting hardware. Furnish signal
face orientation to traffic by serrated rings or other devices on housing
sections and mounting hardware. Permit adjustment in increments not
greater than 5 degrees of rotation and not affected by wind gusts when
locked. Furnish galvanized steel or aluminum spacers and drop pipes 1
1/2 inches (38 mm) nominal pipe size (1.90 inch (48 mm) actual
diameter). Ensure that disconnect hangers have at least twelve terminals
unless a greater number is required.
Paint signal external surfaces with yellow enamel paint, Color 13655,
Federal Standard 595 or gloss black to closely agree with Federal
Standard 595, Color 13655 or Color 17038, as specified in the plans.
Paint interior surfaces of visors flat black.
Furnish materials according to the Department’s Qualified Products
List (QPL).
732.02 Vehicular Signal Heads, Optically Programmed, 12-inch
(300 mm) Lens. Ensure that optically programmed signal heads
incorporate an optical system projecting an indication that is programmed
to be visible only within boundaries of a specific area. Ensure that the
optical system is capable of being veiled anywhere to within 15 degrees
of the optical axis using procedures and opaquing material according to
the manufacturer’s instructions.
Ensure that the signal sections conform to applicable portions of the
ITE standard and 732.01. Furnish and mount optical sections with a 12inch (300 mm) lens size alone or in combination with additional sections
of optically programmed or conventional optics types to form signal
faces and heads. Furnish an optically programmed signal section that
includes an incandescent lamp or, if specified, a LED lamp.
Balance adjusters, if specified, shall have a splined eyebolt design and
splined external clamping body. All assembly hardware shall be stainless
steel.
Furnish a visor with each signal section.
Cable entrance adapters shall be of the tri-stud type with stainless steel
hardware. A neoprene gasket placed under the clamp washer in the top
signal section shall effectively seal the entrance adapter on the signal to
make a weatherproof connection and shall have a minimum thickness of
3/32 inch (2.5 mm).
Furnish materials according to the Department’s Qualified Products
List (QPL).
732.03 Vehicular Signal Heads, Optically Programmed, 8-inch
(200 mm) Lens. Optically programmed signal heads with 8-inch (200
mm) lenses consist of a conventional 8-inch (200 mm) signal housing,
reflector and door; and an extension portion which is attached in place of
a conventional lens and which contains a lens system capable of optical
programming. Furnish the conventional signal housing with reflector and
wiring, and the optical programmable extension portion according to the
applicable requirements of 732.01 and 732.02.
Furnish a cutaway visor with each signal section. Ensure that the
signal sections include an incandescent lamp or when specified, a LED
lamp.
Programming the 8-inch (200 mm) lens type head requires the use of
an extender tool as recommended by the manufacturer to move the
extension portion to the side to expose the optics for programming
purposes.
Furnish materials according to the Department’s Qualified Products
List (QPL).
732.04 Signal Lamps.
A. Optically Programmed and Pedestrian Signal Incandescent
Lamps. Ensure that optically programmed and pedestrian signal
incandescent lamps conform to the ITE A Standard for Traffic Signal
Lamps and Table 732.04-1.
TABLE 732.04-1
Lens
Configuration
12-inch (300 mm)
vehicular optically
programmed
8-inch (200 mm)
vehicular optically
programmed
Pedestrian,
type A-1
Pedestrian,
type A-2
Pedestrian,
type D-2
1260
Light Center
Watts Length,
max.
inches
Envelope
input (mm)[1]
Glass
150
Sealed
beam
PAR-46
115 2 7/16 (62)
frosted
1300
120
2 7/16 (62)
clear
6000
1650
150
3 (76)
clear
6000
550
70
2 7/16 (62)
clear
6000
Lumens
min.
initial
950[2]
Rated
Life,
hours
6000
[1] Light center length is the distance between the filament center and the base tip.
[2] Beam intensity, integral reflector type.
Furnish materials according to the Department’s Qualified Products
List (QPL).
B. Vehicular Signal Incandescent Lamps. Prequalify all traffic
vehicular signal incandescent lamps with the Office of Traffic
Engineering (OTE) according to Supplement 1046. Ensure that vehicular
signal lamps conform to the ITE A Standard for Traffic Signal Lamps
and Table 732.04-2.
Table 732.04-2
Lumens, Watts,
min.
max.
initial
input
1650
150
Light Center
Length,
Rated
inches
Envelope Life,
(mm)[1]
Glass hours
3 (76)
clear
8000
Lens
Configuration
12-inch (300 mm)
vehicular
8-inch (200 mm) vehicular 550
70
2 7/16 (62)
clear
8000
(YELLOW)
8-inch (200 mm) vehicular 1260
116
2 7/16 (62)
clear
8000
(GRN/RED)
[1]
Light center length is the distance between the filament center and the
base tip.
In addition to the requirements of Table 732.04-2, provide model A-19
or AT-19 lamps for 8-inch (200 mm) and model A-21 or AT-21 for 12inch (300 mm). Supply a medium brass screw type base with reflection
disk. Furnish a C-11V or C-9 filament with a minimum of five hook
supports for maximum filament stability. Ensure that the lamp contains
at least 85 percent Krypton gas. Ensure that the voltage is a 120V 10V,
60 hertz cycle. Ensure that the lamp operates over the temperature range
from -40 to 165 F (-40 to 73.9 C) and from 0 to 100 percent humidity.
Operate the lamp in the horizontal position. Ensure that the glass
envelope and base have a maximum seal temperature of 662 F (350 C).
Ensure that the glass is free of any impurities that might allow moisture
build up within the lamp. Ensure that the glass envelope of the lamp is
indelibly marked to show: original manufacturer’s identification, rated
voltage, rated lumens, rated average life, rated wattage, date of
manufacture, and batch code.
Furnish materials according to the Department’s Qualified Products
List (QPL).
C. Vehicular and Pedestrian Light Emitting Diode (LED) Lamps.
Prequalify vehicular and pedestrian LED lamps according to Supplement
1097.
Furnish LED signal lamp units that meet or exceed all the
requirements of the current Institute of Transportation Engineers (ITE)
publications - Vehicle Traffic Control Signal Heads (VTCSH) - Light
Emitting Diode (LED) Circular Signal Supplement 2005; Pedestrian
Traffic Control Signal Indications (PTCSI) - Part 2: Light Emitting Diode
(LED) Pedestrian Traffic Signal Modules and Vehicle Traffic Control
Signal Heads - Part 3: Light Emitting Diode (LED) Vehicle Arrow
Traffic Signal Modules, unless otherwise stated herein. . LED module
shall be certified by the Intertek LED Traffic Signal Module Certification
Program.
All LED signal lamp units shall be the latest model currently in
production and new. Equipment no longer being manufactured shall not
be accepted, even if it meets the following specifications.
LED signal lamp units shall conform to the following criteria:
1. Physical and Mechanical Requirements
a. The LED traffic signal lamp unit shall be designed as a retrofit
replacement for existing incandescent signal lamps and shall not require
any special tools for installation. The 12"(300 mm) retrofit replacement
LED traffic signal lamp unit shall fit into existing traffic signal housings
built to ITE VTCSH standards without modifications.
b. Installation of a retrofit replacement LED traffic signal lamp unit
into an existing signal housing shall only require removal of the existing
lens and incandescent lamp. The new unit shall fit securely in the housing
door and connect to existing electrical wiring or terminal block by means
of simple connectors. Removal of the reflector is optional.
c. Each LED signal lamp unit shall be identified on the back side
with the following:
1) Manufacturer’s name and trademark
2) Part number
3) Serial number
4) Voltage rating
5) Power consumption (watts and volt-ampere)
6) Vertical indexing indicator (i.e., “up arrow”, or the word
“UP” or “TOP”) if specific orientation of the module is
required.
7) Date of manufacture (minimum information required month & year)
Single units shall have identification markings as to the type and color of
the module. Bi-Modals shall be marked with module type.
Each LED signal lamp unit shall have a label placed on the unit
certifying compliance to ITE standards for color and luminance.
d. The LED traffic signal lamp unit shall be a single, self-contained
device, not requiring on-site assembly for installation into an existing
traffic signal housing.
e. The assembly and manufacturing process for the LED traffic
signal lamp unit assembly shall be such as to assure all internal LED and
electronic components are adequately supported to withstand mechanical
shock and vibration from high winds and other sources.
f. The lens of the LED signal lamp unit shall be capable of
withstanding ultraviolet light (direct sunlight) exposure for a minimum
time period of five years without exhibiting evidence of deterioration.
g. Ensure that lenses will withstand a 3.5 foot (1.0 meter) drop test,
are a minimum of 1/8 inch (3 mm) thick, and are free of bubbles and
imperfections. The lenses shall be smooth on the outside with no
external facets to prevent dirt and debris build up.
h. Each LED traffic signal lamp unit shall comprise a UV stabilized
polymeric outer shell, multiple LED light sources, and a regulated power
supply.
i. If red or yellow lenses are tinted, they shall match the wavelength
(chromaticity) of the LED. Do not furnish green tinted lenses.
j. An optical assembly shall diffuse the light output and provide
uniform illumination across the entire surface of the lens and eliminate
the visibility of the individual LEDs to the observer. The optical
assembly shall be used for all ball modules and shall be optional on
arrow and pedestrian modules.
k. The LED traffic signal lamp unit shall be designed for universal
installation in both span wire and standard/stationary pole mount
applications.
l. The AArrow@ pattern produced by the Arrow LED traffic signal
lamp units shall conform to the VTCSH standard for color, size and
shape. The Arrow LED traffic signal lamp units shall not require a
specific orientation or have a variance in light output, pattern or visibility
for any mounting orientation.
m. LED pedestrian signal lamp units shall be designed as a retrofit
replacement, modular or screw in unit for the message bearing surface of
a 12" (300 mm) pedestrian traffic signal, type A-2, housing built to the
PTCSI - part 2 Standard.
n. The LED pedestrian signal lamp unit shall fit into existing
pedestrian signal housings without the need to modify the housing.
Installation of the retrofit replacement LED pedestrian signal lamp unit
into an existing 12"(300 mm) pedestrian signal housing shall only require
the removal of the existing message bearing surface, existing lamp
components (i.e. lens, lamp module, gaskets, and reflector) and insertion
of the retrofit replacement into the area once occupied by the removed
assembly.
o. The single pedestrian module shall be designed to display a full
AHAND@ icon and a full” Walking “Person icon that complies with
PTCSI standards for this (icon) symbol for the size specified.
p. LED traffic signal lamp units shall be visible at 450 feet (137
meters) during sway conditions (extended view) until obscured by the
visor.
q. The module shall be designed to detect catastrophic loss of the
LED load. Upon sensing the loss of the LED load, the module shall
present a resistance of at least 250K Ohms across the input power leads
within 300 msec.
r. Turn-On and Turn-off time is less than 75 msec. Also, low
voltage Turn-Off is less than 35 Volts.
2. Photometric Requirements
a. The red, yellow and orange lamps shall be manufactured using
AlInGaP (Aluminum-Indium-Gallium-Phosphide) technology or other
LEDs with lower susceptibility to temperature degradation than AlGaS
(Aluminum-Gallium-Arsenic). AlGaS LEDs will not be permitted.
Green lamps shall be manufactured using Indium Gallium Nitride.
b. Each LED traffic signal lamp unit shall meet minimum
laboratory light intensity values, color (chromaticity), and light output
distribution as described in ITE
VTCSH – LED Circular Signal
Supplement of the specifications 4.1, and 4.2 as a minimum. Table A-1
provides the minimum maintained luminous intensity values for the
VTCSH LED Circular Signal. Environmental test shall include an
expanded view for the red and green ball indications with the following
minimums for a period of 60 months.
Table A-1
Minimum Luminous Intensity Values (In Candelas)
Vertical Angle Horizontal Angle
(Left/Right)
2.5
-17.5
17.5
2.5
-12.5
17.5
RED YELLOW GREEN
51
15
110
37
127
36
273
91
67
19
143
48
-7.5
2.5
17.5
281
91
701
228
366
119
-2.5
2.5
17.5
358
117
892
291
466
152
2.5
7.5
12.5
17.5
2.5
7.5
12.5
2.5
7.5
2.5
7.5
12.5
17.5
2.5
17.5
150
124
84
47
69
55
40
37
29
37
29
22
11
26
18
373
309
209
118
173
137
100
91
73
91
73
55
27
64
46
195
162
109
62
90
71
52
48
38
48
38
29
14
33
24
+2.5
+7.5
+12.5
-22.5
-27.5
Notes:
Luminous intensity values for equivalent left and right horizontal
angles are the same.
Tabulated values of luminous intensity are rounded to the nearest
whole value.
Arrow Indications (in candelas/m2)
Yellow
Green
11,000
11,000
c. LEDs for arrow indications shall be spread evenly across the
illuminated portion of the arrow area. Arrow LED traffic signal lamp
units shall meet VTCSH – Part 3: LED Vehicle Arrow Traffic Signal
Modules, March 2004. Arrow LED traffic signal lamp units shall be
designed so that when operated over the specified ambient temperature
and voltage ranges, the signal is clearly visible and attracts attention for a
distance of at least 1300 feet (400 meters) under normal atmospheric
conditions. Arrow LED traffic signal lamp units shall have 3 rows of
LEDs only.
d. Measured chromaticity coordinates of LED traffic signal lamp units
shall conform to the chromaticity requirements of the following table, for
a minimum period of 60 months, over an operating temperature range
specified in section AD@. Each LED traffic signal lamp unit shall meet
the minimum requirements for light output for the entire range from 80 to
135 volts.
Chromaticity Standards
Red
Y: not Y: not greater than 0.308 or less than 0.998 - x
Yellow
Green
Y: not Y: not less than 0.411 nor less than 0.995 - x
nor less than 0.452
Y: not Y: not less than 0.506 - 0.519x
nor less than 0.150 + 1.068x nor more than 0.730
e. LED pedestrian signal lamp units shall be designed so that when
operated over the specified ambient temperature and voltage ranges, the
signal shall attract the attention of, and be readable to, a viewer (both day
and night) at all distances from 10 feet (3 meters) to the full width of the
area to be crossed.
f. The measured chromaticity coordinates of LED pedestrian signal
lamp units shall conform to the chromaticity requirements of Section 5.3,
Color and the associated Figure C of the PTCSI standard, for a minimum
period of 60 months, over an operating temperature range specified in
section AD@. Each LED traffic signal lamp unit shall meet the minimum
requirements for light output for the entire range from 80 to 135 volts.
3.
Electrical
a. Each unit shall incorporate a regulated power supply engineered to
electrically protect the LEDs and maintain a safe and reliable operation.
The power supply shall provide capacitor filtered DC regulated current to
the LEDs per the LED manufacturer=s specification. Design of the
power supply shall be such that the failure of an individual component or
any combination of components cannot cause the signal to be illuminated
after AC power is removed.
b. The LED traffic signal lamp unit shall operate on a 60 Hz AC line
voltage ranging from 80 volts RMS to 135 volts RMS. The circuitry
shall prevent flickering over this voltage range. Nominal rated voltage
for all measurements shall be 120  3 volts RMS.
c. All unit types shall be operationally compatible with the traffic
signal equipment that each type is designed and intended to interface
with. This equipment includes all controllers, conflict monitors, current
monitors, switch pack and flashers currently in use by the Ohio
Department of Transportation. The LED traffic signal lamp unit shall be
operationally compatible with all TS-1, TS-2, 170 and 2070 controllers,
NEMA TS-1 conflict monitors (including so-called NEMA plus features
such as dual indication detection and short yellow time detection);
NEMA TS-2 Malfunction Management Units; and 170 cabinet Type
210ECL and 2010ECL conflict monitors (including red monitoring and
so-called plus features such as dual indication detection and short yellow
time detection) currently used by the Department. In the case of conflicts
between specifications, the latest ODOT specifications will control.
d. The individual LED light sources shall be wired so that a catastrophic
failure of one LED light source will not result in the loss of more than 1
LED light source in the LED signal lamp unit.
e. Two, captive, color coded, 600 V, 20 AWG minimum jacketed wires,
3 feet (0.9 m) long, conforming to the National Electric Code, rated for
service at 221 F (105 C), are to be provided for an electrical
connection.
f. The LED signal shall operate with a minimum 0.90 power factor.
g. Total harmonic distortion (current and voltage) induced into an
AC power line by a signal lamp unit shall not exceed 20 percent.
h. LED signal lamp units and associated on-board circuitry shall
conform to the requirements in Federal Communications Commission
(FCC) Title 47, Sub Part B, Section 15 regulations concerning the
emission of electronic noise.
i. The LED signal lamp units shall incorporate circuitry to ensure that
they show no evidence of illumination for input voltages below 35 volts.
LED signal lamp units shall be illuminated (unregulated illumination) for
all input voltages higher than 45 volts AC but less than 80 volts AC.
They shall have fully regulated illumination for applied voltages of 80
volts through 135 volts AC. Proof of the intended function of this
circuitry shall be accomplished by connecting the lamps to a variable
voltage source and slowly raising the applied voltage from zero volts up
to 135 volts, and then slowly lowering the applied voltage from 135 volts
to zero volts.
j. Proposed LED signal lamp units shall be less than or equal to the
base wattage shown below at 77 F (25 C).
Retrofit
12@ R 12”Red Ball
12@ Y 12” Yellow Ball
12@ G 12” Green Ball
12@ Y 12” Yellow Arrow
12@ G 12” Green Arrow
Wattage
12 or less
22 or less
15 or less
10 or less
l9 or less
4. Environmental Requirements
a. Green and red LED traffic signal lamp units shall be rated for use in
the ambient operating temperature range of -40 F to +166 F (-40 C
to +74 C). Yellow signal lamps shall be rated at a range of -13 F to
+77 F (-25 C to +25 C).
b. The unit shall consist of a housing that is a sealed watertight
enclosure that eliminates dirt contamination and allows for safe handling
in all weather conditions. The LED signal lamp unit shall be sealed
against dust and moisture intrusion per the requirements of NEMA
Standard 250-1991 for Type 4 enclosures to protect all internal LED and
electrical components.
5. Documentation Requirements. Each LED traffic signal lamp unit
shall be provided with the following documentation:
a. Installation instructions.
b. The manufacturer name, brand and model number of all LEDs
used shall be provided, along with the LED manufacturer=s
recommended drive current and degradation curves.
6. Warranty. The LED signal lamp unit shall be repaired or replaced
by the manufacturer if it exhibits a failure due to workmanship or
material defects within the first 60 months of field operation.
The LED signal lamp unit shall be repaired or replaced by the
manufacturer if, when operating over the specified operating ambient
temperature and voltage ranges, the unit does not meet or exceed all
minimum luminous intensity requirements as defined in the ITE (Institute
of Transportation Engineers) LED Purchase Specification - Vehicle
Traffic Control Signal Heads (VTCSH), Part 2: Light Emitting Diode
(LED) Vehicle Traffic Signal Modules dated June 2005 during the first
60 months of field operation.
The measured chromaticity coordinates of LED signal lamp units
shall conform to the requirements for chromaticity in Section 4.2 and
Figure 1 of the ITE VTCSH and the PTCSI over the temperature range
provided in the Specifications for the duration of the warranty period.
The manufacturer shall provide a written warranty against defects
in materials, workmanship and luminous intensity for LED signal lamp
units for a period of 60 months after installation of LED signal lamp
units. Replacement LED signal lamp units shall be provided within 10
days after receipt of failed LED signal lamp units at no cost, except the
cost of shipping the failed units.
An LED pedestrian signal lamp unit shall be repaired or replaced
by the manufacturer if the signal lamp unit does not attract the attention
of, or is not readable to, a viewer (both day and night) at all distances
from 10 feet (3 meters) to the full width of the area to be crossed when
operated over the specified operating ambient temperature and voltage
ranges.
Furnish materials according to the Department’s Qualified Products
List (QPL).
732.05 Pedestrian Signal Heads. Furnish pedestrian signal heads
that conform to the ITE Pedestrian Traffic Control Signal Indications.
Furnish signal heads that are complete units made up of two optical
compartments with no leakage of light from one compartment to another.
Ensure that the signal heads alternately display the symbol of an upraised
hand in portland orange and the symbol of a walking person in white
light. Do not furnish outline style symbols.
Furnish material for
housings that consist of cast or sheet, corrosion resistant, non-ferrous
metal. Adequately reinforce the housings. Ensure that the lens frames
are non-ferrous metal or polycarbonate material.
Ensure that the lenses are glass or ultraviolet and impact-resistant
plastic and display the legend with translucent symbols within an opaque
black background.
Seal the lens to the door frame by the use of a weatherproof seal.
Furnish an elastomeric gasket between the door frame and housing to
ensure a dust and weatherproof seal.
Use a signal head design that provides adequate dissipation of heat to
ensure rated lamp life.
Ensure that the reflectors distribute light evenly from the source to the
lens and are fastened or fitted securely in the compartment. Furnish
reflectors made of highly specular finished aluminum, silvered glass,
porcelainized steel, or break resistant silvered plastic. Finish reflector
material to preserve the original reflective properties.
Fit each compartment of pedestrian signal heads with a visor that is at
least 7 inches (175 mm) in length or, in lieu of visors, protect the entire
face with a sunshade fastened close to the lens. Furnish a black grid
sunshade fabricated of high impact resistant plastic with a nominal depth
of 1 1/2 inches (38 mm) and consisting of horizontal members spaced at
not more than 1/2-inch (13 mm) and vertical members spaced
appropriately.
Furnish pedestrian signal heads with required mounting brackets.
Furnish either pipe type brackets or, when compatible with the mounting
position required by the plans, two-piece hinged type brackets that
support the signal head close to the pole.
Furnish 1 1/2-inch (38 mm) galvanized steel pipe brackets with
necessary fittings and adapters, and that are one-way or two-way as
required. Orient the signal face to crosswalks by selective meshing of
serration rings or other devices provided on housings and mounting
brackets. Make adjustment in increments not greater than 5 degrees of
rotation and that is not affected by wind gusts when locked.
Furnish two-piece hinged brackets of cast aluminum with stainless
steel hinge pins, and when closed will be secured by a tamperproof bolt.
Ensure that the mounting incorporates a terminal block for quick
disconnect of field wiring. Ensure that the mounting design permits
attachment to the pole by banding, bolting or by lag screws in the case of
wood poles.
Paint signal exterior surfaces black with enamel paint. Paint interior
surfaces of visors flat black.
Furnish pedestrian signal head types according to Table 732.05-1.
Table 732.05-1
Signal Head Type
A1
A2
D2
Symbol Height, Inches, (mm)
6 (152)
9 (229)
9 (229)
Light Source
Clear lamp
Incandescent, LED
Clear lamp
Incandescent, LED
If specified, furnish the types listed below:
A. Type A1. Furnish a signal head that utilizes the housings of two 8inch (200 mm) lens type vehicular traffic sections connected together to
form a vertical unit. Ensure that the sections have square lenses. Ensure
that the upper lens displays the symbol of an upraised hand in portland
orange and the lower lens will display the symbol of a walking person in
white . Install a lamp in each section.
Furnish materials according to the Department’s Qualified Products
List (QPL).
B. Type A2. Furnish a signal head that utilizes the housings of two
12-inch (300 mm) lens type vehicular traffic sections connected together
to form a vertical unit. Ensure that the sections have square lenses with
the same symbol position as Type A1. Install a lamp in each section.
Furnish materials according to the Department’s Qualified Products
List (QPL).
C. Type D2. Furnish a single housing signal head with a lens in one
piece or in two sections, one for each message. Color and mask the lens
to display in portland orange the symbol of an upraised hand from the left
compartment and the symbol of a walking person in white from the right
compartment. Furnish reflectors and baffle that form two light
compartments.
Install a clear glass incandescent lamp in each
compartment. When a LED light source is specified, the upraised hand
and the walking person symbols may be integral in the same
compartment.
D. Countdown.
1. Operation.
a. Display driver shall be designed to allow individual LED failures
without affecting other LEDs in the same display.
b. The countdown timer shall be of the “smart” type, which
continuously samples the timing intervals presented by the pedestrian
signal load switch driver(s) in order to “learn” the programmed timing
being used by the controller.
c. During interval sampling time, the countdown timer numerical
display shall be blank.
d. Sampling time to determine interval settings shall take a maximum
of two complete signal cycles.
e. The unit shall be capable of displaying a countdown commencing at
the onset of the pedestrian clearance interval and reaching zero at the end
of the pedestrian clearance interval.
f. Any interruption of the flashing pedestrian clearance display, e.g.,
preemption, timing plan change, during a countdown display shall
immediately cause blanking of the countdown numerals. The countdown
timer shall “re-learn” the pedestrian clearance interval upon return to
normal service after preemption or immediately following a change in
walk clearance time associated with a timing plan change.
2. Type A2. The top section shall be identical to the 12 inch (300
mm) Type D2 pedestrian signal. The bottom section shall consist of a
countdown display in a 12 inch (300 mm) housing. The display numeral
segments shall be comprised of two rows of discrete LEDs.
3. Type D2. The left side of the signal section shall consist of an
integral hand/walking person display. The right side compartment shall
contain the countdown display. The display numeral segments shall be
comprised of two rows of discrete LEDs.
Furnish materials according to the Department’s Qualified Products
List (QPL).
732.06 Pedestrian Pushbuttons. Furnish pushbuttons of sturdy
construction that consist of a base housing and a removable cover.
Furnish components that provide a pushbutton with normally open
contacts and that include all electrical and mechanical parts required for
operation.
Ensure that the design of the pushbutton and its associated contacts
and housing are sturdy and resistant to mechanical shocks and abuse.
Ensure that a concentrated force of 50 pounds (225 N) applied to the
button or any exposed portion does not damage the unit or misadjusts the
contacts. Furnish a housing with a curved back surface for mounting on
poles of various diameters. Integrate the curved surface with the housing
or supply an adapter with a flat back type housing. Attach the cover
assembly to the housing by stainless steel machine screws, resulting in a
weatherproof and shockproof assembly. Furnish a hole threaded for a
1/2-inch (13 mm) pipe in the housing for conduit attachment purposes.
Paint external surfaces yellow with enamel paint of Color 13655, Federal
Standard 595.
Ensure that the maximum force required to operate the pushbutton is 5
pounds per foot (22.5 N). Furnish a raised or flush pushbutton with a
minimum of 2 inches (50 mm) at its smallest dimension.
Furnish pedestrian pushbutton signs that are a minimum of 0.07-inch
(1.8 mm) steel or 0.10-inch (2.5 mm) aluminum. Ensure that the legends
and backgrounds are baked enamel paint for steel signs and enamel paint
or non-reflective sheeting for aluminum signs.
Furnish materials according to the Department’s Qualified Products
List (QPL).
732.07 Loop Detector Units.
A. NEMA TS-1. Ensure that the loop detector units comply with the
requirements of NEMA TS-1, section 15, with the following
modifications. Furnish shelf mounted loop detector units that are
powered from 120 volts. Use solid state isolated output units for all
controller applications where directly connected to a solid state digital
controller unit. Ensure that the conductors in the cable harness for loop
input pins are twisted three to five times per 1 foot (300 mm).
Ensure that the electrical connections for four-channel shelfmounted units either are the 19-pin MS connector, as required by the
foregoing specification, or consist of four connectors of the type required
for single-channel shelf-mounted detector units.
If specified, design detector unit electrical connection plugs or
wiring harness such that any multi-channel shelf-mounted detector unit
may be readily replaced with single-channel detector units. Accomplish
this by furnishing only units with the connector type required for singlechannel shelf-mounted detector units, or by wiring the controller back
panel to single-channel harnesses which are, in turn, plug-connected to an
adapter harness which is mated to the multi-channel connector of the
detector unit.
Furnish loop detector unit with an LED or LCD display indication
of call strength (∆L/L or equivalent). This display shall be a bar graph
or numerical display with at least eight (8) discrete levels indicated.
Furnish materials according to the Department’s Qualified Products
List (QPL).
B. NEMA TS-2. Furnish loop detector units according to NEMA
Standards TS-2.
Furnish loop detector unit with an LED or LCD display indication
of call strength (∆L/L or equivalent). This display shall be a bar graph
or numerical display with at least eight (8) discrete levels indicated.
Furnish materials according to the Department’s Qualified Products
List (QPL).
732.08 Loop Detector Units, Delay and Extension Type. Ensure
that the loop detector units of this type comply with the requirements of
NEMA TS-1, section 15. Furnish shelf-mounted loop detector units that
are powered from 120 volts. Use solid state isolated output units for all
controller application where directly connected to a solid state digital
controller unit. When specified, apply the provisions of 732.07 for
possible replacement of multi-channel units with single channel units.
Furnish loop detector unit with an LED or LCD display indication of
call strength (∆L/L or equivalent). This display shall be a bar graph
or numerical display with at least eight (8) discrete levels indicated.
Furnish materials according to the Department’s Qualified Products
List (QPL).
Furnish materials according to the Department’s Qualified Products
List (QPL).
732.11 Signal Supports. Furnish signal poles and mast arms that are
tapered tubes of a true continuous taper. Furnish tubes that are circular or
regular polygons with six or more sides. Ensure that any measurements
of circular tube diameter at a specific point along the longitudinal axis do
not vary by more than 3/16-inch (5 mm). Ensure that the taper is
between 0.54 and 1.3 percent.
Fabricate mast arms of the true continuous taper type in two portions
joined by overlapping of sections with the overlap being at least 1 1/2
diameters as determined by the largest diameter of the outer portion.
Assemble the sections with a 5/8-inch (16 mm) minimum stainless steel
or galvanized steel hex head through-bolt.
Ensure that there is not more than one longitudinal, automatically
electrically welded seam on circular poles. Ensure that the welded seams
are neat and uniform in appearance and have a thickness not less than the
base material and a bead height not exceeding 1/16-inch (2 mm). Ensure
that the wall thickness at each pole or arm cross-section is of uniform
thickness, except at weld beads. Do not place transverse seams or welds
on true continuous taper type poles or arms. Weld according to 513.17.
After fabrication, hot-dip galvanize poles and arms according to
711.02.
Do not use guy rods or truss-type arms. Furnish poles and mast arms
with attachment plates and gussets. Assemble using high-strength bolts
with the connection developing the full moment-resisting capability of
the arm. Do not allow the butt diameter of mast arms to exceed the
nominal diameter of the pole at the point of attachment.
Fit poles with a welded-on cast or plate steel base designed to mount
on an anchor bolt foundation and ensure that each pole includes the
furnishing of anchor bolts and conduit ells for installation in the
foundation. Furnish at least one 2-inch (50 mm) diameter conduit ell for
installation in each foundation. Furnish conduit ells made from steel
complying with 725.04; however, if they connect to non-metallic conduit,
ensure that they are of the same non-metallic material.
Use steel anchor bolts conforming to ASTM F1554, Grade 105 and
galvanized according to 711.02. Ensure that the galvanizing extends at
least 2 inches (50 mm) beyond the threads. Ensure that ends either are
bent or have a drilled and tapped steel plate as shown on the plans.
Ensure that the poles include a handhole near the base oriented as
required. Reinforce the handhole with a welded-on steel frame with a
grounding lug and fit it with a cover plate fastened by stainless steel
screws. Ensure that the poles also include a cable and wire support Jhook welded near the top and a removable pole cap. Design poles and
arms so their interiors conceal wiring and their mast arms include
grommeted wire outlets for the signal heads. Furnish hanger clamps with
clevises on the mast arms for the signal heads as required. Ensure that
arm caps are made of steel and cover at least 50 percent of the end area.
Ensure that signal poles combining provisions for roadway lighting
include an additional handhole located opposite the mast arm flange with
the poles’ J-hook located above.
Furnish pedestrian pushbutton access holes and blind half couplings
for controllers and pedestrian signal heads as required. Plug any unused
holes.
Furnish certified materials according to Supplement 1094.
732.12 Strain Poles. Furnish signal strain poles for the attachment of
span wire that are steel tapered tubes according to the requirements of
732.11. Ensure that all poles include a removable pole cap, and
messenger wire clamps with clevis and shackle unless otherwise
specified.
Furnish anchor bolt foundation type strain poles that include a weldedon cast or plate steel base, bolt covers, a handhole, and a J-hook, as
required by 732.11, and that also include at least one 2-inch (50 mm)
cable entrance with a weatherhead and a welded blind half-coupling.
Ensure that the poles include the furnishing of anchor bolts and conduit
ells for installation in the foundation. Furnish at least one 2-inch (50
mm) diameter conduit ell for installation in each foundation. Furnish
steel conduit ells that comply with 725.04; however, if they connect to
non-metallic conduit, ensure that they are of the same non-metallic
material.
Furnish certified materials according to Supplement 1094.
732.13 Wood Poles. Furnish wood poles that conform to ANSI 05.1
“Specifications and Dimensions for Wood Poles”, that are made of
Southern Pine or Western Red Cedar, and that are full-length pressure
treated according to 725.19.
732.14 Down Guy Assemblies. Furnish down guy assemblies
according to 725.19. Furnish insulators and hardware that conform to
732.18.
Furnish expanding or screw type anchors capable of
withstanding a guy tension of 8000 pounds (35 kN) when installed in
firm moist soil.
Furnish materials according to the Department’s Qualified Products
List (QPL).
732.15 Pedestals. Fabricate pedestals for the support of traffic
control equipment of 4-inch (100 mm) schedule 40 steel or aluminum
pipe. Fit the steel pipe with a welded-on base of plate or cast steel, or
when specified thread the steel pipe into a gray cast iron transformer type
base. Furnish galvanized steel pedestals according to 711.02. Thread
aluminum pipe into an aluminum cast transformer type base. Design
pedestals to mount on an anchor bolt foundation and include the
furnishing of anchor bolts and conduit ells for installation in the
foundation.
Furnish materials according to the Department’s Qualified Products
List (QPL).
732.16 Conduit Risers. Ensure that risers have conduit and fittings
according to 725.04 and the weatherhead is made of aluminum or
galvanized ferrous metal and threaded.
732.17 Cable Support Assemblies. Ensure that the cable grip used
with cable support assemblies is of the proper size and strength for the
cables and is of the flexible “closed” or “split with rod” type, of stainless
steel or tin coated bronze, and equipped with a single “U” eye bale.
Ensure that the smallest cable grip permitted has a minimum rated
breaking strength of 250 pounds (1.1 kN).
Ensure that the slings for cable supports are made from copper clad or
galvanized multi-strand steel wire with an overall diameter of not less
than 1/8-inch (3 mm) and a breaking strength of at least 400 pounds (1.7
N). Use thimbles to form eyes at each end of the sling with grooves to
match the wire. Adjust the sling to the proper length with the wire at
each thimble lapped and secured with split bolt clamps.
Furnish materials according to the Department’s Qualified Products
List (QPL).
732.18 Messenger Wire. Furnish Utilities Grade messenger wire,
twisted strand galvanized steel wire according to ASTM A 475, Class B,
with the exception that tags according to Section 19.2 are not required on
lengths less than 1000 feet (300 m), and that 1/4-inch (6 mm) sevenstrand be high-strength. Ensure that all accessories have a rated loading
strength equal to or greater than the messenger wire minimum breaking
strength. For breakaway tether installations, accessories shall have
strength equal to or greater than 3000 pounds (13.2 kN). Furnish
galvanized steel helical lashing rods in 5-foot (1.5 m) lengths.
Furnish materials according to the Department’s Qualified Products
List (QPL).
732.185 Tether Wire. Furnish Utilities Grade tether wire, ¼-inch (6
mm), twisted strand galvanized steel according to ASTM A475, Class B,
with the exception that tags according to Section 19.2 are not required on
lengths less than 1000 feet (300 m). Ensure that all accessories except Shooks have rated load strength equal to or greater than the tether wire
minimum breaking strength. S-hooks shall be made of mild low-carbon
galvanized steel and of the wire size indicated on the plans; larger wire
sizes and higher-strength steel S-hooks shall not be substituted. Safety
tie wire shall be 304 or 316 stainless steel, 1x19 stranded, 1/8-inch (3
mm) with stainless steel wire rope clips. Lead sheet to wrap tether wire
in breakaway anchors shall be commercially pure lead of thickness 0.030
to 0.042 inches (0.75 to 1.0 mm).
732.19 Cable and Wire. Furnish cable and wire meeting the
requirements of Table 732.19-1 and rated at 600 volts with conductors of
copper unless otherwise specified. Ensure that the cable or wire jacket is
indelibly marked at intervals of not more than 6 feet (2 m) with
nomenclature stating the size, the type, the organization specifying the
type, and the manufacturer’s name or trademark.
Furnish materials according to the Department’s Qualified Products
List (QPL).
732.20 Power Service. Furnish risers for power service that are 1 to
1 1/2-inch (25 to 38 mm) diameter conduit and fittings according to
725.04 Furnish weatherheads that are threaded and made of aluminum
or galvanized ferrous metal. Include a disconnect switch with enclosure.
732.21 Disconnect Switch with Enclosure. Ensure that the switch
enclosure is a UL listed watertight lockable stainless steel NEMA Type 4
supplied with the conduit hubs listed on the enclosure UL label. Furnish
an enclosure that contains as a minimum a single-throw, 2 pole, solid
neutral, fused safety disconnect switch (or circuit breaker) UL listed as
suitable for a service disconnect with a minimum capacity of 30-amperes
at 240 VAC. Ensure that the unit can be padlocked in both the “ON” and
“OFF” positions.
Furnish materials according to the Department’s Qualified Products
List (QPL).
732.22 Backplates. Furnish backplates constructed of wrought sheet
aluminum, according to ASTM B 209 (B 209M), 6061-T6, .050 inch (1.3
mm) minimum thickness. Backplate base metal shall be anodized to
maximize paint adhesion according to Mil-A-8625, Type II or Type I.
Furnish backplates painted on both sides with at least two coats of flat
black alkyd enamel paint or polyester powder coat (no epoxy) closely
matching FED-STD-595b-37038. Furnish a backplate that extends 5
inches (125 mm) beyond the outside of the signal assembly on all sides.
The overall outside shape of the installed backplate shall be rectangular.
The backplate shall allow no gaps between the backplate and the signal
head or between signal sections. A 2- inch (50 mm) wide continuous
outside border of yellow or fluorescent yellow reflective sheeting shall be
applied to the front face of the backplate. Reflective sheeting shall be
Type H or J listed on the Department’s Qualified Products List. All
assembly and mounting hardware shall be stainless steel conforming to
730.10. If used, machine nuts shall be thread-deforming or nylon
locknuts. Rivets shall not be used for mounting the backplate to the
signal head. A minimum of four mounting points shall be used on each
signal section for attaching the backplate. Furnish all mounting
hardware.
Cable or
Wire
Number of
Conductors
Signal Cable
As specified
As specified
Interconnect
cable
Twisted
pairs as
specified
As specified
Interconnect
cable,
integral,
messenger
type
Loop
detector wire
Loop
detector
lead-in cable
TABLE 732.19-1 CABLE AND WIRE
Wire
Specification or
Conductor
Gage
type
Type
As
IMSA 19-1
Copper, color
specified
IMSA 20-1
coded, stranded
As
IMSA 19-1
Copper, color
specified
IMSA 20-1
coded, stranded
RUS PE-39
As
Copper, color
IMSA 19-2
specified
coded, solid
IMSA 20-2
As
IMSA 19-3
Copper, color
specified
IMSA 20-3
coded, stranded
Twisted
pairs as
specified
As
specified
IMSA 19-4
IMSA 20-4
Single
conductor
14 AWG
IMSA 51-5
Two
conductor
14 AWG
IMSA 50-2
UL:
RHH/RHW/USE or
XHHW, cross linked
polyethylene w. an
insulation thickness
of 0.045 in(1.14 mm)
(min.)
Power cable
Two
conductor
As
specified
Service cable
Two
conductor
(duplex)
As
specified
Ground Wire
Loop
detector
lead-in cable,
direct burial
Loop
detector
lead-in cable,
Integral
messenger
type
Single
conductor
Copper, color
coded, solid
Notes
ANSI/ICEA
Cable shall
have:
Solid
insulations
Full count
color coding
8-mil shield
772 kHz
attenuation
compliance
All other
specifications
are
manufacturers
option unless
specified.
Copper,
stranded
Copper, twisted
pair, stranded,
shielded
Copper,
stranded
Threeconductor
cable may be
specified.
Permitted
substitution: 2
(or 3) single
conductor
cable
Aluminum, [1]
twisted,
stranded
UL:
RHH/RHW/USE or
XHHW, cross linked
polyethylene
Copper,
stranded
As specified
12 or 14
AWG, or
as
specified
IMSA 19-6
IMSA 20-6
Copper,
stranded
As specified
12 or 14
AWG, or
as
specified
IMSA 19-4
IMSA 20-4
Copper,
stranded
Minimum size
is equal to the
power or
service cable,
whichever is
larger.
[1] Copper Conductors may be substituted